//
//  NBMainTabBar.swift
//  NBSinaWeibo
//
//  Created by ac on 16/5/19.
//  Copyright © 2016年 ac. All rights reserved.
//

import UIKit

class NBMainTabBar: UITabBar {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        addSubview(plusBtn)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    lazy var plusBtn: UIButton = {
        let btn = UIButton()
        btn.setImage(UIImage(named:"tabbar_compose_icon_add"), forState: .Normal)
        btn.setImage(UIImage(named:"tabbar_compose_icon_add_highlighted"), forState: .Highlighted)
        
        //设置背景图片
        btn.setBackgroundImage(UIImage(named:"tabbar_compose_button"), forState: .Normal)
        btn.setBackgroundImage(UIImage(named:"tabbar_compose_button_highlighted"), forState: .Highlighted)
        return btn
    }()
    
    override func layoutSubviews() {
        super.layoutSubviews()
//        print(subviews)
        let w = ScreenWidth/5
        let h = bounds.height
        var index: CGFloat = 0
        
        for subView in subviews {
            if subView.isKindOfClass(NSClassFromString("UITabBarButton")!) {
                subView.frame = CGRect(x: w * index, y: 0, width: w, height: h)
                index += index == 1 ? 2 : 1
            }
        }
        
        plusBtn.frame = CGRect(x: w * 2, y: 0, width: w, height: h)
    }
    


}
